SIG SAUER M400 TREAD Snake Bite Special Edition Rifle RM40016BTRDSBSE — Description

The SIG SAUER M400 TREAD Snake Bite Special Edition RM40016BTRDSBSE is a premium .223 Remington / 5.56 NATO semi-automatic rifle featuring upgraded components, distinctive Snakebite Flat Dark Earth (FDE) styling, and the proven reliability of SIG Sauer’s M400 TREAD platform. Designed as a modern sporting rifle, this configuration combines a 16.5-inch barrel, Magpul SL-K stock, free-floating M-LOK handguard, and a lightweight aluminum receiver system.

The M400 TREAD Snake Bite uses a direct gas impingement operating system with a rotating bolt design and is compatible with standard AR-15 pattern magazines. The rifle features a mid-length gas system for smooth cycling, a free-floating handguard for accessory mounting, and a 1:8 twist barrel designed to accommodate a wide range of .223 Remington and 5.56 NATO ammunition.

Finished in a distinctive Snakebite FDE color scheme, the Special Edition model includes Magpul furniture, including the SL-K adjustable stock, along with TREAD-series enhancements. It provides a balanced platform suitable for recreational shooting, training, and general-purpose rifle applications.

SIG SAUER M400 TREAD Snake Bite Special Edition — Specifications

Manufacturer: SIG SAUER
Model: M400 TREAD Snake Bite Special Edition
Model Number: RM40016BTRDSBSE
Caliber: .223 Remington / 5.56 NATO
Action: Semi-automatic
Operating System: Direct gas impingement with rotating bolt
Platform: AR-15 style rifle

Barrel Length: 16.5 inches
Barrel Twist Rate: 1:8″
Barrel Type: SIG precision barrel
Receiver Material: Aluminum
Finish: Snakebite Flat Dark Earth (FDE) finish
Handguard: Free-floating M-LOK handguard
Stock: Magpul SL-K 6-position adjustable stock
Magazine Type: AR-15 / STANAG compatible magazine
Magazine Capacity: 30 rounds
Trigger: SIG factory single-stage trigger
Muzzle Thread: 1/2×28 TPI
Overall Length: Approx. 31–34 inches (stock position dependent)
Weight: Approx. 7 lbs (configuration dependent)

Key Features

• Snake Bite Special Edition FDE finish
• .223 Remington / 5.56 NATO chambering
• 16.5-inch barrel
• Mid-length gas system
• Free-floating M-LOK handguard
• Magpul SL-K adjustable stock
• Lightweight aluminum receiver set
• 1:8 twist rate for ammunition versatility
• AR-15 magazine compatibility
• 30-round magazine included
• Optics-ready Picatinny top rail
• SIG Sauer TREAD modular accessory compatibility
• Proven M400 reliability and handling

Package typically includes:

• SIG SAUER M400 TREAD Snake Bite Special Edition rifle
• 30-round magazine
• Magpul SL-K stock
• M-LOK handguard system
• Owner’s manual and safety documentation